Modification to the compulsive exchange method for measuring exchange characteristics of soils

Abstract

The compulsive exchange method for the measurement of cation and anion exchange capacities of soil as described by Gillman and subsequently recommended by the American Society of Agronomy for acid soils has been modified to achieve greater simplicity. Though originally intended for the measurement of highly weathered soils, the method has be extended to saline and non-saline calcareous soils, and also to the measurement of the variation of exchange capacity with pH.